Index: modules/book/book.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/book/book.module,v
retrieving revision 1.557
diff -u -p -r1.557 book.module
--- modules/book/book.module	27 Nov 2010 20:25:44 -0000	1.557
+++ modules/book/book.module	7 Jan 2011 17:20:15 -0000
@@ -280,10 +280,10 @@ function book_block_view($delta = '') {
   }
   elseif ($current_bid) {
     // Only display this block when the user is browsing a book.
-    $select = db_select('node');
-    $select->addField('node', 'title');
-    $select->condition('nid', $node->book['bid']);
-    $select->addTag('node_access');
+  $select = db_select('node', 'n')
+    ->fields('n', array('title'))
+    ->condition('nid', $node->book['bid'])
+    ->addTag('node_access');
     $title = $select->execute()->fetchField();
     // Only show the block if the user has view access for the top-level node.
     if ($title) {